Through a double tube exchanger hot water circulates through the inner tube and water fry through...

Through a double tube exchanger hot water circulates through the inner tube and water
fry through the outer tube. For countercurrent arrangement the following data is displayed:
Cold water inlet temperature Tca 24.5 ° C
Cold water outlet temperature Tcb 48.0 ° C
Hot water inlet temperature Tha 86 ° C
Hot water outlet temperature Thb 55 ° C
Cold water flow 2.00 gal / min
Calliente water flow 2.00 gal / min
Transfer area 0.65 m2 Length of the two pipes is the same 186 cm
to. Build the temperature vs. length diagram
b. Calculate the ΔT1 and ΔT2 approaches c. The temperature ranges ΔTc and ΔTh
d. The average log temperature
and. The global coefficient of heat transfer

Expert Solution

We mostly use countercurrent heat exchanger beacuse in which we get more log mean temperature difference than cocurent or parallel by which we required less surface area for Given heat transfer. Cost of heat exchanger depends upon its surface area which decides how many tubes are required for given heat load.

Amanda K answered 6 months ago

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